Catalina Island Marathon

Event overview

The Catalina Island Marathon, 10K, 5K takes place on Catalina Island in Avalon, California. The 2026 edition is scheduled for March 14, 2026 and is the 48th annual running of the event. The marathon is designated as California’s State Off-Road Marathon Championship and is described as the oldest trail marathon in the state. The courses run through the Catalina Island Conservancy and include ocean views and rolling hills along historic island trails. The event organizer is listed as Catalina Island Marathon, 10K, 5K.

Race details

• 26.2 miles Marathon; open to ages 16-100.
• 6.2 miles 10K.
• 3.1 miles 5K.

A separate Kids Run is offered and is open to ages 3-13. The event also features a TRIPLE CROWN Challenge that combines the 2026 Catalina Island Marathon, the 2026 Catalina Island Half Marathon, and the 2027 Avalon 50M/50K. Organizers moved the 2026 race date from March 7 to March 14 for one year and offered registered entrants options to roll their entry to the new date or defer to 2027 via their RunSignup account. Organizers noted they are working with island hotel partners to assist participants affected by the date change. Visit the organization's website for the most recent information.